import 'dart:convert';
import 'dart:typed_data';

import 'package:http/http.dart' as http;
import 'package:http_parser/http_parser.dart';
import 'package:logging/logging.dart';
import 'package:result_monad/result_monad.dart';

import '../friendica_client/paged_response.dart';
import '../globals.dart';
import '../models/TimelineIdentifiers.dart';
import '../models/connection.dart';
import '../models/credentials.dart';
import '../models/direct_message.dart';
import '../models/exec_error.dart';
import '../models/gallery_data.dart';
import '../models/group_data.dart';
import '../models/image_entry.dart';
import '../models/media_attachment_uploads/image_types_enum.dart';
import '../models/timeline_entry.dart';
import '../models/user_notification.dart';
import '../serializers/friendica/connection_friendica_extensions.dart';
import '../serializers/friendica/direct_message_friendica_extensions.dart';
import '../serializers/friendica/gallery_data_friendica_extensions.dart';
import '../serializers/friendica/image_entry_friendica_extensions.dart';
import '../serializers/mastodon/connection_mastodon_extensions.dart';
import '../serializers/mastodon/group_data_mastodon_extensions.dart';
import '../serializers/mastodon/notification_mastodon_extension.dart';
import '../serializers/mastodon/timeline_entry_mastodon_extensions.dart';
import '../services/auth_service.dart';
import '../services/network_status_service.dart';
import 'paging_data.dart';

class FriendicaClient {
  static final _logger = Logger('$FriendicaClient');
  final Credentials _credentials;
  late final String _authHeader;
  late final NetworkStatusService _networkStatusService;

  String get serverName => _credentials.serverName;

  Credentials get credentials => _credentials;

  FriendicaClient({required Credentials credentials})
      : _credentials = credentials {
    final authenticationString =
        "${_credentials.username}:${_credentials.password}";
    final encodedAuthString = base64Encode(utf8.encode(authenticationString));
    _authHeader = "Basic $encodedAuthString";
    _networkStatusService = getIt<NetworkStatusService>();
  }

  // TODO Convert Notifications to using paging for real
  FutureResult<List<UserNotification>, ExecError> getNotifications() async {
    _networkStatusService.startNotificationUpdate();
    final url =
        'https://$serverName/api/v1/notifications?include_all=true&limit=200';
    final request = Uri.parse(url);
    _logger.finest(() => 'Getting new notifications');
    final result = (await _getApiListRequest(request).andThenSuccessAsync(
            (notificationsJson) async => notificationsJson.data
                .map((json) => NotificationMastodonExtension.fromJson(json))
                .toList()))
        .mapError((error) {
      if (error is ExecError) {
        return error;
      }
      _networkStatusService.finishNotificationUpdate();
      return ExecError(type: ErrorType.localError, message: error.toString());
    });

    _networkStatusService.finishNotificationUpdate();
    return result;
  }

  FutureResult<bool, ExecError> clearNotifications() async {
    final url = 'https://$serverName/api/v1/notifications/clear';
    final request = Uri.parse(url);
    _logger.finest(() => 'Clearing unread notification');
    final response = await _postUrl(request, {});
    return response.mapValue((value) => true);
  }

  FutureResult<bool, ExecError> clearNotification(
      UserNotification notification) async {
    final url =
        'https://$serverName/api/v1/notifications/${notification.id}/dismiss';
    final request = Uri.parse(url);
    _logger.finest(() => 'Clearing unread notification for $notification');
    final response = await _postUrl(request, {});
    return response.mapValue((value) => true);
  }

  // TODO Convert Albums to using paging for real
  FutureResult<List<GalleryData>, ExecError> getGalleryData() async {
    _networkStatusService.startGalleryLoading();
    _logger.finest(() => 'Getting gallery data');
    final url = 'https://$serverName/api/friendica/photoalbums';
    final request = Uri.parse(url);
    final result = (await _getApiListRequest(request).andThenSuccessAsync(
            (albumsJson) async => albumsJson.data
                .map((json) => GalleryDataFriendicaExtensions.fromJson(json))
                .toList()))
        .execErrorCast();
    _networkStatusService.finishGalleryLoading();
    return result;
  }

  // TODO Convert Gallery Images to using paging for real once server side available
  FutureResult<List<ImageEntry>, ExecError> getGalleryImages(
    String galleryName,
    PagingData page,
  ) async {
    _networkStatusService.startGalleryLoading();
    _logger.finest(() => 'Getting gallery $galleryName data with page: $page');
    final baseUrl = 'https://$serverName/api/friendica/photoalbum?';
    final gallery = 'album=$galleryName&latest_first=true';
    final pageParams = page.toQueryParameters();
    final url = '$baseUrl$gallery&$pageParams';
    final request = Uri.parse(url);
    final result = (await _getApiListRequest(request).andThenSuccessAsync(
            (imagesJson) async => imagesJson.data
                .map((json) => ImageEntryFriendicaExtension.fromJson(json))
                .toList()))
        .execErrorCast();
    _networkStatusService.finishGalleryLoading();
    return result;
  }

  // TODO Convert Groups to using paging for real (if it is supported)
  FutureResult<List<GroupData>, ExecError> getGroups() async {
    _logger.finest(() => 'Getting group (Mastodon List) data');
    final url = 'https://$serverName/api/v1/lists';
    final request = Uri.parse(url);
    return (await _getApiListRequest(request).andThenSuccessAsync(
            (listsJson) async => listsJson.data
                .map((json) => GroupDataMastodonExtensions.fromJson(json))
                .toList()))
        .mapError((error) => error is ExecError
            ? error
            : ExecError(type: ErrorType.localError, message: error.toString()));
  }

  FutureResult<bool, ExecError> addConnectionToGroup(
    GroupData group,
    Connection connection,
  ) async {
    _logger.finest(() => 'Adding connection to group');
    final url = 'https://$serverName/api/v1/lists/${group.id}/accounts';
    final request = Uri.parse(url);
    final requestData = {
      'account_ids': [connection.id]
    };
    return (await _postUrl(request, requestData)).mapValue((_) => true);
  }

  FutureResult<bool, ExecError> removeConnectionFromGroup(
    GroupData group,
    Connection connection,
  ) async {
    _logger.finest(() => 'Adding connection to group');
    final url = 'https://$serverName/api/v1/lists/${group.id}/accounts';
    final request = Uri.parse(url);
    final requestData = {
      'account_ids': [connection.id]
    };
    return (await _deleteUrl(request, requestData)).mapValue((_) => true);
  }

  FutureResult<PagedResponse<List<Connection>>, ExecError> getMyFollowing(
      PagingData page) async {
    _logger.finest(() => 'Getting following with paging data $page');
    final myId = getIt<AuthService>().currentId;
    final baseUrl = 'https://$serverName/api/v1/accounts/$myId';
    final result = await _getApiListRequest(
      Uri.parse('$baseUrl/following?${page.toQueryParameters()}'),
    );
    return result
        .andThenSuccess((response) => response.map((jsonArray) => jsonArray
            .map((json) => ConnectionMastodonExtensions.fromJson(json))
            .toList()))
        .execErrorCast();
  }

  FutureResult<PagedResponse<List<Connection>>, ExecError> getMyFollowers(
      PagingData page) async {
    _logger.finest(() => 'Getting followers data with page data $page');
    final myId = getIt<AuthService>().currentId;
    final baseUrl = 'https://$serverName/api/v1/accounts/$myId';
    final result1 = await _getApiListRequest(
      Uri.parse('$baseUrl/followers&${page.toQueryParameters()}'),
    );

    return result1
        .andThenSuccess((response) => response.map((jsonArray) => jsonArray
            .map((json) => ConnectionMastodonExtensions.fromJson(json))
            .toList()))
        .execErrorCast();
  }

  FutureResult<Connection, ExecError> getConnectionWithStatus(
      Connection connection) async {
    _logger.finest(() => 'Getting group (Mastodon List) data');
    final myId = getIt<AuthService>().currentId;
    final id = int.parse(connection.id);
    final paging = '?min_id=${id - 1}&max_id=${id + 1}';
    final baseUrl = 'https://$serverName/api/v1/accounts/$myId';
    final following =
        await _getApiListRequest(Uri.parse('$baseUrl/following$paging')).fold(
            onSuccess: (followings) => followings.data.isNotEmpty,
            onError: (error) {
              _logger.severe('Error getting following list: $error');
              return false;
            });
    final follower =
        await _getApiListRequest(Uri.parse('$baseUrl/followers$paging')).fold(
            onSuccess: (followings) => followings.data.isNotEmpty,
            onError: (error) {
              _logger.severe('Error getting follower list: $error');
              return false;
            });

    var status = ConnectionStatus.none;
    if (following && follower) {
      status = ConnectionStatus.mutual;
    } else if (following) {
      status = ConnectionStatus.youFollowThem;
    } else if (follower) {
      status = ConnectionStatus.theyFollowYou;
    }
    return Result.ok(connection.copy(status: status));
  }

  // TODO Convert groups for connection to using paging for real (if available)
  FutureResult<List<GroupData>, ExecError> getMemberGroupsForConnection(
      String connectionId) async {
    _logger.finest(() =>
        'Getting groups (Mastodon Lists) containing connection: $connectionId');
    final url = 'https://$serverName/api/v1/accounts/$connectionId/lists';
    final request = Uri.parse(url);
    return (await _getApiListRequest(request).andThenSuccessAsync(
            (listsJson) async => listsJson.data
                .map((json) => GroupDataMastodonExtensions.fromJson(json))
                .toList()))
        .mapError((error) => error as ExecError);
  }

  // TODO Convert User Timeline to using paging for real
  FutureResult<List<TimelineEntry>, ExecError> getUserTimeline(
      {String userId = '', int page = 1, int count = 10}) async {
    _logger.finest(() => 'Getting user timeline for $userId');
    _networkStatusService.startTimelineLoading();
    final baseUrl = 'https://$serverName/api/statuses/user_timeline?';
    final pagingData = 'count=$count&page=$page';
    final url = userId.isEmpty
        ? '$baseUrl$pagingData'
        : '${baseUrl}screen_name=$userId$pagingData';
    final request = Uri.parse(url);
    final result = (await _getApiListRequest(request).andThenSuccessAsync(
            (postsJson) async => postsJson.data
                .map((json) => TimelineEntryMastodonExtensions.fromJson(json))
                .toList()))
        .execErrorCast();
    _networkStatusService.finishTimelineLoading();
    return result;
  }

  FutureResult<List<TimelineEntry>, ExecError> getTimeline(
      {required TimelineIdentifiers type, required PagingData page}) async {
    _networkStatusService.startTimelineLoading();
    final String timelinePath = _typeToTimelinePath(type);
    final String timelineQPs = _typeToTimelineQueryParameters(type);
    final baseUrl = 'https://$serverName/api/v1/$timelinePath';
    final url =
        '$baseUrl?exclude_replies=true&${page.toQueryParameters()}&$timelineQPs';
    final request = Uri.parse(url);
    _logger.finest(() => 'Getting ${type.toHumanKey()} with paging data $page');
    final result = (await _getApiListRequest(request).andThenSuccessAsync(
            (postsJson) async => postsJson.data
                .map((json) => TimelineEntryMastodonExtensions.fromJson(json))
                .toList()))
        .execErrorCast();
    _networkStatusService.finishTimelineLoading();
    return result;
  }

  FutureResult<Uint8List, ExecError> getFileBytes(Uri url) async {
    _logger.finest('GET: $url');
    try {
      final response = await http.get(
        url,
        headers: {
          'Authorization': _authHeader,
        },
      );

      if (response.statusCode != 200) {
        return Result.error(ExecError(
            type: ErrorType.authentication,
            message: '${response.statusCode}: ${response.reasonPhrase}'));
      }
      return Result.ok(response.bodyBytes);
    } catch (e) {
      return Result.error(
          ExecError(type: ErrorType.localError, message: e.toString()));
    }
  }

  // TODO Convert getPostOrComment to using paging for real
  FutureResult<List<TimelineEntry>, ExecError> getPostOrComment(String id,
      {bool fullContext = false}) async {
    return (await runCatchingAsync(() async {
      final baseUrl = 'https://$serverName/api/v1/statuses/$id';
      final url = fullContext ? '$baseUrl/context' : baseUrl;
      final request = Uri.parse('$url?limit=1000');
      _logger.finest(() =>
          'Getting entry for status $id, full context? $fullContext : $url');
      return (await _getApiRequest(request).andThenSuccessAsync((json) async {
        if (fullContext) {
          final ancestors = json['ancestors'] as List<dynamic>;
          final descendants = json['descendants'] as List<dynamic>;
          final items = [
            ...ancestors
                .map((a) => TimelineEntryMastodonExtensions.fromJson(a)),
            ...descendants
                .map((d) => TimelineEntryMastodonExtensions.fromJson(d))
          ];
          return items;
        } else {
          return [TimelineEntryMastodonExtensions.fromJson(json)];
        }
      }));
    }))
        .execErrorCastAsync();
  }

  // TODO Convert getLikes to using paging for real
  FutureResult<List<Connection>, ExecError> getLikes(String id) async {
    _networkStatusService.startInteractionsLoading();
    final result = (await runCatchingAsync(() async {
      final url = 'https://$serverName/api/v1/statuses/$id/favourited_by';
      final request = Uri.parse('$url');
      _logger.finest(() => 'Getting favorites for status $id');
      return (await _getApiListRequest(request)
          .andThenSuccessAsync((jsonArray) async {
        return jsonArray.data
            .map((p) => ConnectionMastodonExtensions.fromJson(p))
            .toList();
      }));
    }))
        .execErrorCastAsync();
    _networkStatusService.finishInteractionsLoading();
    return result;
  }

  // TODO Convert getReshares to using paging for real
  FutureResult<List<Connection>, ExecError> getReshares(String id) async {
    _networkStatusService.startInteractionsLoading();
    final result = (await runCatchingAsync(() async {
      final url = 'https://$serverName/api/v1/statuses/$id/reblogged_by';
      final request = Uri.parse('$url');
      _logger.finest(() => 'Getting rebloggers for status $id');
      return (await _getApiListRequest(request)
          .andThenSuccessAsync((jsonArray) async {
        return jsonArray.data
            .map((p) => ConnectionMastodonExtensions.fromJson(p))
            .toList();
      }));
    }))
        .execErrorCastAsync();
    _networkStatusService.finishInteractionsLoading();
    return result;
  }

  FutureResult<bool, ExecError> deleteEntryById(String id) async {
    _logger.finest(() => 'Deleting post/comment $id');
    final url = 'https://$serverName/api/v1/statuses/$id';
    final request = Uri.parse(url);
    return (await _deleteUrl(request, {})).mapValue((_) => true);
  }

  FutureResult<TimelineEntry, ExecError> createNewStatus({
    required String text,
    String spoilerText = '',
    String inReplyToId = '',
    List<String> mediaIds = const [],
  }) async {
    _logger.finest(() =>
        'Creating status ${inReplyToId.isNotEmpty ? "In Reply to: " : ""} $inReplyToId, with media: $mediaIds');
    final url = Uri.parse('https://$serverName/api/v1/statuses');
    final body = {
      'status': text,
      'visibility': 'public',
      if (spoilerText.isNotEmpty) 'spoiler_text': spoilerText,
      if (inReplyToId.isNotEmpty) 'in_reply_to_id': inReplyToId,
      if (mediaIds.isNotEmpty) 'media_ids': mediaIds,
    };
    final result = await _postUrl(url, body);
    if (result.isFailure) {
      return result.errorCast();
    }

    final responseText = result.value;

    return runCatching<TimelineEntry>(() {
      final json = jsonDecode(responseText);
      return Result.ok(TimelineEntryMastodonExtensions.fromJson(json));
    }).mapError((error) {
      return ExecError(type: ErrorType.parsingError, message: error.toString());
    });
  }

  FutureResult<TimelineEntry, ExecError> resharePost(String id) async {
    _logger.finest(() => 'Reshare post $id');
    final url = Uri.parse('https://$serverName/api/v1/statuses/$id/reblog');
    final result = await _postUrl(url, {});
    if (result.isFailure) {
      return result.errorCast();
    }

    final responseText = result.value;

    return runCatching<TimelineEntry>(() {
      final json = jsonDecode(responseText);
      return Result.ok(TimelineEntryMastodonExtensions.fromJson(json));
    }).mapError((error) {
      return ExecError(type: ErrorType.parsingError, message: error.toString());
    });
  }

  FutureResult<TimelineEntry, ExecError> unResharePost(String id) async {
    _logger.finest(() => 'Reshare post $id');
    final url = Uri.parse('https://$serverName/api/v1/statuses/$id/unreblog');
    final result = await _postUrl(url, {});
    if (result.isFailure) {
      return result.errorCast();
    }

    final responseText = result.value;

    return runCatching<TimelineEntry>(() {
      final json = jsonDecode(responseText);
      return Result.ok(TimelineEntryMastodonExtensions.fromJson(json));
    }).mapError((error) {
      return ExecError(type: ErrorType.parsingError, message: error.toString());
    });
  }

  FutureResult<TimelineEntry, ExecError> changeFavoriteStatus(
      String id, bool status) async {
    final action = status ? 'favourite' : 'unfavourite';
    final url = Uri.parse('https://$serverName/api/v1/statuses/$id/$action');
    final result = await _postUrl(url, {});
    if (result.isFailure) {
      return result.errorCast();
    }

    final responseText = result.value;

    return runCatching<TimelineEntry>(() {
      final json = jsonDecode(responseText);
      return Result.ok(TimelineEntryMastodonExtensions.fromJson(json));
    }).mapError((error) {
      return ExecError(type: ErrorType.parsingError, message: error.toString());
    });
  }

  FutureResult<Connection, ExecError> acceptFollow(
      Connection connection) async {
    final id = connection.id;
    final url =
        Uri.parse('https://$serverName/api/v1/follow_requests/$id/authorize');
    final result =
        await _postUrl(url, {}).andThenSuccessAsync((jsonString) async {
      return _updateConnectionFromFollowRequestResult(connection, jsonString);
    });
    return result.mapError((error) => error is ExecError
        ? error
        : ExecError(type: ErrorType.localError, message: error.toString()));
  }

  FutureResult<Connection, ExecError> rejectFollow(
      Connection connection) async {
    final id = connection.id;
    final url =
        Uri.parse('https://$serverName/api/v1/follow_requests/$id/reject');
    final result =
        await _postUrl(url, {}).andThenSuccessAsync((jsonString) async {
      return _updateConnectionFromFollowRequestResult(connection, jsonString);
    });
    return result.mapError((error) => error is ExecError
        ? error
        : ExecError(type: ErrorType.localError, message: error.toString()));
  }

  FutureResult<Connection, ExecError> ignoreFollow(
      Connection connection) async {
    final id = connection.id;
    final url =
        Uri.parse('https://$serverName/api/v1/follow_requests/$id/ignore');
    final result =
        await _postUrl(url, {}).andThenSuccessAsync((jsonString) async {
      return _updateConnectionFromFollowRequestResult(connection, jsonString);
    });
    return result.mapError((error) => error is ExecError
        ? error
        : ExecError(type: ErrorType.localError, message: error.toString()));
  }

  FutureResult<Connection, ExecError> followConnection(
      Connection connection) async {
    final id = connection.id;
    final url = Uri.parse('https://$serverName/api/v1/accounts/$id/follow');
    final result =
        await _postUrl(url, {}).andThenSuccessAsync((jsonString) async {
      return _updateConnectionFromFollowRequestResult(connection, jsonString);
    });
    return result.mapError((error) => error is ExecError
        ? error
        : ExecError(type: ErrorType.localError, message: error.toString()));
  }

  FutureResult<Connection, ExecError> unFollowConnection(
      Connection connection) async {
    final id = connection.id;
    final url = Uri.parse('https://$serverName/api/v1/accounts/$id/unfollow');
    final result =
        await _postUrl(url, {}).andThenSuccessAsync((jsonString) async {
      return _updateConnectionFromFollowRequestResult(connection, jsonString);
    });
    return result.mapError((error) => error is ExecError
        ? error
        : ExecError(type: ErrorType.localError, message: error.toString()));
  }

  FutureResult<Connection, ExecError> getMyProfile() async {
    _logger.finest(() => 'Getting logged in user profile');
    final request = Uri.parse('https://$serverName/api/friendica/profile/show');
    return (await _getApiRequest(request)).mapValue((json) =>
        ConnectionFriendicaExtensions.fromJson(json['friendica_owner'])
            .copy(status: ConnectionStatus.you, network: 'friendica'));
  }

  FutureResult<ImageEntry, ExecError> uploadFileAsAttachment({
    required List<int> bytes,
    String description = '',
    String album = '',
    String fileName = '',
  }) async {
    final postUri = Uri.parse('https://$serverName/api/friendica/photo/create');
    final request = http.MultipartRequest('POST', postUri);
    request.headers['Authorization'] = _authHeader;
    request.fields['desc'] = description;
    request.fields['album'] = album;
    request.files.add(await http.MultipartFile.fromBytes(
        'media',
        filename: fileName,
        contentType:
            MediaType.parse('image/${ImageTypes.fromExtension(fileName).name}'),
        bytes));
    final response = await request.send();
    final body = utf8.decode(await response.stream.toBytes());
    if (response.statusCode != 200) {
      return Result.error(
        ExecError(
          type: ErrorType.missingEndpoint,
          message: body,
        ),
      );
    }

    final imageDataJson = jsonDecode(body);
    final newImageData = ImageEntryFriendicaExtension.fromJson(imageDataJson);

    return Result.ok(newImageData);
  }

  FutureResult<List<DirectMessage>, ExecError> getDirectMessages(
      PagingData page) async {
    final baseUrl = 'https://$serverName/api/direct_messages/all';
    final pagingQP = page.toQueryParameters(limitKeyword: 'count');
    final url = '$baseUrl?$pagingQP';
    final request = Uri.parse(url);
    _logger.finest(() => 'Getting direct messages with paging data $page');
    return (await _getApiListRequest(request).andThenSuccessAsync(
            (response) async => response.data
                .map((json) => DirectMessageFriendicaExtension.fromJson(json))
                .toList()))
        .execErrorCast();
  }

  FutureResult<DirectMessage, ExecError> markDirectMessageRead(
      DirectMessage message) async {
    final id = message.id;
    final url = Uri.parse(
        'https://$serverName/api/friendica/direct_messages_setseen?id=$id');
    final result =
        await _postUrl(url, {}).andThenSuccessAsync((jsonString) async {
      return message.copy(seen: true);
    });

    return result.execErrorCast();
  }

  FutureResult<DirectMessage, ExecError> postDirectMessage(
    String? messageIdRepliedTo,
    String receivingUserId,
    String text,
  ) async {
    final url = Uri.parse('https://$serverName/api/direct_messages/new');
    final body = {
      'user_id': receivingUserId,
      'text': text,
      if (messageIdRepliedTo != null) 'replyto': messageIdRepliedTo,
    };
    final result = await _postUrl(url, body)
        .andThenAsync<DirectMessage, ExecError>((jsonString) async {
      final json = jsonDecode(jsonString) as Map<String, dynamic>;
      if (json.containsKey('error')) {
        return buildErrorResult(
            type: ErrorType.serverError,
            message: "Error from server: ${json['error']}");
      }
      return Result.ok(
          DirectMessageFriendicaExtension.fromJson(jsonDecode(jsonString)));
    });

    return result.execErrorCast();
  }

  FutureResult<PagedResponse<String>, ExecError> _getUrl(Uri url) async {
    _logger.finer('GET: $url');
    try {
      final response = await http.get(
        url,
        headers: {
          'Authorization': _authHeader,
          'Content-Type': 'application/json; charset=UTF-8'
        },
      );

      if (response.statusCode != 200) {
        return Result.error(ExecError(
            type: ErrorType.authentication,
            message: '${response.statusCode}: ${response.reasonPhrase}'));
      }
      return PagedResponse.fromLinkHeader(
        response.headers['link'],
        utf8.decode(response.bodyBytes),
      );
    } catch (e) {
      return Result.error(
          ExecError(type: ErrorType.localError, message: e.toString()));
    }
  }

  FutureResult<String, ExecError> _postUrl(
      Uri url, Map<String, dynamic> body) async {
    _logger.finer('POST: $url \n Body: $body');
    try {
      final response = await http.post(
        url,
        headers: {
          'Cookies': 'XDEBUG_SESSION=PHPSTORM;path=/;',
          'Authorization': _authHeader,
          'Content-Type': 'application/json; charset=UTF-8'
        },
        body: jsonEncode(body),
      );

      if (response.statusCode != 200) {
        return Result.error(ExecError(
            type: ErrorType.authentication,
            message: '${response.statusCode}: ${response.reasonPhrase}'));
      }
      return Result.ok(utf8.decode(response.bodyBytes));
    } catch (e) {
      return Result.error(
          ExecError(type: ErrorType.localError, message: e.toString()));
    }
  }

  FutureResult<String, ExecError> _deleteUrl(
      Uri url, Map<String, dynamic> body) async {
    _logger.finer('DELETE: $url');
    try {
      final response = await http.delete(
        url,
        headers: {
          'Authorization': _authHeader,
          'Content-Type': 'application/json; charset=UTF-8'
        },
        body: jsonEncode(body),
      );

      if (response.statusCode != 200) {
        return Result.error(ExecError(
            type: ErrorType.authentication,
            message: '${response.statusCode}: ${response.reasonPhrase}'));
      }
      return Result.ok(utf8.decode(response.bodyBytes));
    } catch (e) {
      return Result.error(
          ExecError(type: ErrorType.localError, message: e.toString()));
    }
  }

  FutureResult<PagedResponse<List<dynamic>>, ExecError> _getApiListRequest(
      Uri url) async {
    return (await _getUrl(url).andThenSuccessAsync(
      (response) async =>
          response.map((data) => jsonDecode(data) as List<dynamic>),
    ))
        .mapError((error) => error as ExecError);
  }

  FutureResult<dynamic, ExecError> _getApiRequest(Uri url) async {
    return (await _getUrl(url).andThenSuccessAsync(
      (response) async => jsonDecode(response.data),
    ))
        .execErrorCastAsync();
  }

  String _typeToTimelinePath(TimelineIdentifiers type) {
    switch (type.timeline) {
      case TimelineType.home:
        return 'timelines/home';
      case TimelineType.global:
        return 'timelines/public';
      case TimelineType.local:
        return 'timelines/public';
      case TimelineType.group:
        return 'timelines/list/${type.auxData}';
      case TimelineType.profile:
        return '/accounts/${type.auxData}/statuses';
      case TimelineType.self:
        final myId = getIt<AuthService>().currentId;
        return '/accounts/$myId/statuses';
    }
  }

  String _typeToTimelineQueryParameters(TimelineIdentifiers type) {
    switch (type.timeline) {
      case TimelineType.home:
      case TimelineType.global:
      case TimelineType.profile:
      case TimelineType.group:
      case TimelineType.self:
        return '';
      case TimelineType.local:
        return 'local=true';
    }
  }

  Connection _updateConnectionFromFollowRequestResult(
      Connection connection, String jsonString) {
    final json = jsonDecode(jsonString) as Map<String, dynamic>;
    final theyFollowYou = json['followed_by'] ?? 'false';
    final youFollowThem = json['following'] ?? 'false';
    late final ConnectionStatus newStatus;
    if (theyFollowYou && youFollowThem) {
      newStatus = ConnectionStatus.mutual;
    } else if (theyFollowYou) {
      newStatus = ConnectionStatus.theyFollowYou;
    } else if (youFollowThem) {
      newStatus = ConnectionStatus.youFollowThem;
    } else {
      newStatus = ConnectionStatus.none;
    }
    return connection.copy(status: newStatus);
  }
}